AERCO Innovation (G-10-1350 to G-11-0563) - Manual (Page 67)

Chapter 6 Innovation Series Water Heaters
GF-128
Maintenance USER MANUAL OMM-0079_0B
07/21/11 AERCO International, Inc.
· 100 Oritani Dr. · Blauvelt, NY 10913 · Ph: 800-526-0288
Page 67 of 200
6.8 HEAT EXCHANGER CLEANING
AERCO recommends that the heat exchanger of the unit be cleaned annually using a solution of
Hydroskrub and water. Hydroskrub is distributed by AERCO International, Inc. and is designed to dissolve
the toughest water scale, lime, mud and rust deposits from virtually any type of water-based equipment.
NOTE
The following cleaning procedure applies to all sizes WWDW and SWDW Heaters. For
Helical Coil Type Water Heaters, refer to the applicable manuals listed in Section 1, page
1-8 of this document for cleaning/descaling procedures.
CAUTION
Please review MSDS, specifications, and our website ( www.aerco.com) for
additional information, or call technical service at (800) 526-0288.
CAUTION
Do not drain the unit without venting the shell! A vacuum in the unit may displace
the liner causing serious damage not covered by warranty.
6.8.1 Pumping System Set-Up Instructions
A sample pumping set-up diagram is shown in Figure 6-8 for an Innovation Water Heater. As this
diagram shows, heat exchanger cleaning is accomplished by pumping the HydroSkrub solution from a
large circulating bucket to the heat exchanger drain valve, through the heat exchanger and then out
through the output connection of the heater. Set up the pumping system as follows:
1. Turn off the water heater and close the inlet and outlet isolation valves.
2. Open the drain valve at the rear of the heater and drain at least half of the heat exchanger water-side
volume. When full Innovation models INN800 and INN1060 hold approximately 22 gallons of water.
Therefore, drain 11 gallons of water from the heat exchanger.
3. Prepare a 50% solution of Hydroskrub and clean water. The amount of the solution should be
approximately equal to the full volume of water that the heat exchanger holds.
4. Mix 11 gallons of HydroSkrub with 11 gallons of water to provide a 50% solution.
5. Close the unit drain valve and connect a suitable size bucket and pump to the unit drain as shown in
Figure 6-8.
6. Install a “T”, ball valve and hose connection in the outlet piping of the heater (Figure 6-8). Route the
hose back to the top of the circulation bucket.